c7c3eac627
Add low-level debug support for vybrid, so that earlyprintk can be enabled for debugging early boot issue. Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
26 lines
599 B
ArmAsm
26 lines
599 B
ArmAsm
/*
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* Copyright 2013 Freescale Semiconductor, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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.macro addruart, rp, rv, tmp
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ldr \rp, =0x40028000 @ physical
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ldr \rv, =0xfe028000 @ virtual
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.endm
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.macro senduart, rd, rx
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strb \rd, [\rx, #0x7] @ Data Register
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.endm
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.macro busyuart, rd, rx
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1001: ldrb \rd, [\rx, #0x4] @ Status Register 1
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tst \rd, #1 << 6 @ TC
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beq 1001b @ wait until transmit done
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.endm
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.macro waituart,rd,rx
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.endm
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